The only reason that I can think of for doing that is to temporarily test out a RAM card that is configured to start at address 256K.
I don’t know if it applies here, or if it’s even really true, but the AST Rampage 286 manual suggests a performance boost in expanded memory applications if the card is configured to back fill more conventional memory.
That's true if you're multitasking with desqview for sure. Other EMS applications I doubt it matters a whole lot
It is someone's very out-of-date copy of minuszerodegrees.netBTW modem7 what is: https://ibm.retropc.se/ ?
That will not work due to differing pinouts. For example, the 41128 type chip (128 Kbit, comprising of two piggybacked chips) requires two RAS signals, but the later 5170 motherboard, being designed for a 41256 type chip, only generates one RAS signal for each chip.Maybe to do 256k on the board you need to use those piggybacked chips like on the type 1 boards.